Sleep experts recommend at least 7 hours a night, on a regular basis, for adults aged 18 to 60. Below that, the risks of obesity, high blood pressure, diabetes and depression go up. Yet about one in three American adults falls short. Sleep isn't wasted time: it's your body's nightly maintenance shift.
Chlorine on its own is fairly gentle. But when it combines with urine, sweat and other grime from swimmers, it forms chloramines, which cause stinging eyes and that classic 'chlorine smell'. A well-kept pool barely smells at all. Shower before you swim and never pee in the water.
Muscle mass slowly shrinks with age, putting independence at risk. But in 1990, a study had nursing home residents aged 86 to 96 train their legs for eight weeks: their strength more than doubled. Muscle responds to training at any age. Getting up from a chair without using your hands is already an exercise.